Shoe machine for sole laying



April 5, 1966 Filed March 19, 1965 FIG! 3 Sheets-Sheet 1 S BYa' INVENTOR EDGAR HAAS v ATTORNEYS April 5, 1966 E. HAAS' 3,243,82

SHOE. MACHINE FOR SOLE LAYING Filed March 19. 1965 5 Sheets-Sheet 2 FIG.3

INVENTOR. EDGAR HAAS BY Z Z ATTORNEYS April 5, 1966 I E. HAAS v 3,243,829

SHOE MACHINE FOR SOLE LAYING Filed March 19; 1965 s Sheets-Sheet s FIG.7

INVENTOR. EDGAR HAAS BY v M Z ATTORNEYS applied to the actuator.

United States Patent Office Patented Apr. 5, 1966 3,243,829 SHOE MACHINE FOR SOLE LAYING Edgar Haas, New York, N.Y., assignor to Herman Schwabe, Inc., Brooklyn, N.Y., a corporation of New York Filed Mar. 19, 1965, Ser. No. 441,214 14 Claims. (Cl. 12-36) This invention relates to shoe machines for sole laying, or for sole and heel breast fiap laying, and more particularly to such machines used in combination with a hydraulic pad.

A known form of sole laying machine employs an upright hydraulic actuator which moves a yieldable pad carrying a lasted shoe upward against stops. 'F-or ladies high-heeled shoes there may be separated toe and heel pads, and the heel pad may be moved horizontally toward the toe pad by means of an auxiliary actuator. In preferred form the yieldable pad is water filled, and such an arrangement is shown in my Patent No. 3,092,860 issued June 11, 1963. The general object of the present invention is to improve shoe machines, and more particularly the shoe machine of said patent.

The trend in making ladies shoes is to use a high temperature thermoplastic cement. It may be applied at a temperature of say 450 F. but cools and sets very quickly. It is therefore important that the pad adapt itself quickly to the shape of the shoe bottom, so as to timely exert the desired pressure all over the shoe bottom. The angle between the sole and the shank of a high-heeled shoe may vary greatly. In a shoe of large size this angle is much smaller than a shoe of small size, for the same heel height. Moreover, different shoes may have very different heel heights, with consequent change in angle for the same shoe size. The shoe shapes differ, and the side areas differ, with different styles. The pad therefor may have to greatly change in shape to conform to the shoe bottom.

The liquid filled pad is an improvement over a solid rubber pad, but even the liquid filled pad requires time to change shape. Accordingly, a more particular object of the present invention is to accelerate the change in shape, and for this purpose I apply hydraulic pressure from the main hydraulic system to the shoe pad. Instead of the quantity of liquid in the pad being constant, the amount may be boosted as needed in order to better and more quickly adapt the pad shape to fit the shoe.

The hydraulic systems in current use employ oil rather than water. The yieldable wall or membrane ofthe pad is a special rubber which would deteriorate rapidly in the presence of oil. The rubber must withstand heat and abrasion from the shoe bottom, as Well as flexing and pressure. This special rubber therefor is used in contact with water, that is, the pad is filled with Water. A further object of the present invention is to reconcile these conflicting requirements, and for this purpose the hydraulic system is connected to the pad through a flexible diaphragm of adequate area, the oil and water being separated by the said diaphragm. The diaphragm may be made of urethane or other material which may be subjected to both oil and Water.

Another object is to limit the pressure applied to the pad compared to the much larger pressure which may be A further object concerns the circuitry controlled by an adjustable timeclock so that the press is automatically released at the end of a desired 'cure time for the cement, and is to relieve the .pressure in the pad just ahead of the release of the actuators, so that there will be no tendency for the pad to balloon. To accomplish the foregoing general objects, and other more specific objects which will hereinafter appear, my invention resides in the shoe machine and liquid filled pad elements, and their relation one to another, as are more particularly described in the following specification;

The specification is accompanied by drawings in which:

FIG. 1 is a side elevation of a shoe machine embodying features of my invention;

FIG. 2 is a front elevation of the same;

FIGS. 3, 4 and 5 are schematic vertical sections explanatory of the operation;

FIG. 6 is a transverse section through a water filled pad, and is taken approximately on the line 6-6 of FIG. 1;

:FIG. 7 is a hydraulic diagram for both stations shown in FIG. 2; and

FIG. 8 is an electrical diagram for one of the two stations, the other stat-ion having a like diagram.

Referring to the drawing, and more particularly to FIGS. 1 and 2, the machine comprises a base 12 carrying an upri ht post 14, with a crossbeam 16 for two stations. The rear part 18 of the base acts as an oilreservoir carrying a submerged pump which is driven by a motor 29, the latter being disposed vertically above the reservoir 18. A shoe 22 on a last 24 is supported by a liquid filled pad 26. The latter is carried by a platen 28 mounted on the ram 30 of a main actuator which is housed in the base 12. This actuatoris vertical, and serves to raise pad 26 against fixed toe and heel stops 32 and 34, adjustably mounted on a crosshead or rail 36 having a post 38 which is carried in one end of beam 16.

When dealing with a high-heeled ladies shoe, as here shown, the pad 26 is preferably a toe pad, and the platen 28 further carries a heel pad'4ti which is movable toward or away from the toe pad 26, as by means of a small auxiliary horizontal actuator 42, which is supplied through a flexible hose 44, and which is carried by and moves vertically with the platen 28. In such case the heel breast flap may be cemented simultaneously with the sole.

The machine has a foot treadle 46, momentary depression of which starts its side or station of the machine, including a clock timer 48, This is set to a desired curing time, and when the time runs out the press is released, that is the platen 2-8 descends and the heel pad 40 retracts, thereby releasing the shoe for removal from the machine.

The parts of therighthand station shown in FIG. 2 duplicate those of the lefthand station so far described. The right-hand station has its own treadle 50, and its own timing clock 52] However, the single motor 20 and its submerged pump serve for both stations, and a single pressure gauge indicated at 54 in FIG. 2 thereforv serves for both stations. A

As so far describedthe machine maybe like thatdisclosed in my aforesaid Patent No. 3,092,860. However, in that machine the toe and heel pads both are liquid filled, and the amount of liquid in the pads is fixed. In the present machine the heel pad 40 is a solid pad made of a suitable yieldable rubber. It could be'liquid filled. The toe pad 26 is water filled, and in accordance with my invention, it is connected through a flexible hose 60 to the hydraulic system.

The pressure applied to pad 26 is preferably reduced, as by means of a pressure reducing valve, and this is preferably made adjustable, as by means of a control indicated at 62. The reduced pressure is shown on an added pressure gauge 63. The connection to the hydraulic system preferably is made through a housing 64 with a movable diaphragm. The hose 60 connects the upper half 64 of the housing to the pad 26, and the lower half 68 of the housing is connected through the pressure reducing valve to the hydraulic system, as is later described in greater detail. In this way the pad 26 may be water filled even though the hydraulic system uses oil, the oil and water being separated by a diaphragm in housing 64, 63. The diaphragm is of sufiicient area and displacement to permit boosting of the quantity of water in pad 26 to the extent needed to quickly adapt the pad shape to the shoe bottom.

The liquid filled pad may be conventional in construction, and an understanding of its construction will be had from inspection of FIG. 6 of the drawing. The metal body or so-called pad box comprises a bottom wall '72, two side walls 74, and one end wall 76, all preferably cast and rigid. The top wall 78 and one end wall 80 (FIG. 3) are yieldable, usually being laminations of a selected appropriate rubber which are tightly secured to the cast body, as by means of flexible metal strips 82 and a series of closely spaced bolts 84. An additional sheet of rubber or leather 86 may be put in position to take some of the friction and wear, and to shield the upper ends of the bolts 84. The pad is mounted on platen 28, as by means of clamps and bolts 88.

This construction has been simplified in FIGS. 3, 4, and 5, which are drawn schematically rather than structurally. The shoe 'sole and heel breast flap and extra pad laminations are all omitted to more clearly show the operation.

Referring now to FIG. 3, the shoe 90 is a high-heeled shoe with a relatively steep angle between the sole 92 and the shank '94. The pad is connected by flexible hose 60 to the diaphragm housing. A diaphragm 66 is clamped between the upper half 64 and the lower half 68 of the housing, and tthe'later is connected by a pipe 9%) to the hydraulic system.

Assuming the rest position of the toe pad 26 conforms to the shape of the shoe, as here shown, the position of diaphragm 66 will not change significantly during operation of the machine. The water filled pad may function as though unconnected to an outside system.

This is to be contrasted with FIG. 4 in which the shoe 96 has a lower heel and a bottom 28 which differs substantially in shape from the top 78, of the pad. It is evident that considerable change .in shape is needed. This can take place even with a constant quantity of water in the .pad, but only .slowly and with difiiculty, compared to the fast setting time of modern cements, which may set in say five seconds. The pad must be pushed down for displacement, with extra strain on the rubber, before it assumes the desired shape.

With the present improvement when the press is operated a change takes place which is illustrated in FIG. 5. The diaphragm 66 rises under hydraulic pressure, from the down position shown .in FIG. 4 to the raised position shown in FIG. 5, thereby displacing a quantity of water into the "box of the water filled .pad. This helps to rapidly raise the part 78 of the pad to conform to the shoe 96, as shown in FIG. 5.

In the particular case here illustrated the diaphragm has an inside diameter of five inches, and the housing carries about twenty-five cubic inches of liquid on each side .of the diaphragm. The displacement of the diaphragm may reach the housing, and so accommodates considerable displacement of liquid, which is fully adequate for the present purpose.

The hydraulic system maybe described with reference to the diagram of FIG. 7. The oil carried in tank 18 is pumped by a submerged pump 180, which develops a pressure above .a range of say 350 to 500 psi. The system usually includes a relief valve 102 with a return pipe 104, and the pump operates continuously.

'The working pressure is established by the adjustment of the relief valve, and'a handle for this is shown at 192 in FIG. 2. The pressure is shown by gauge 54. There is a spring pressed accumulator 106 (FIG. 7) which helps assure rapid rise of the main actuator 108 or 110 of either station. The actuators are controlled through solenoid operated valves 112 and 114. The auxiliary actuators 42 and 116 are connected to the main actuators 1118 and 110 respectively, and therefore are controlled by the same solenoid operated'valves 112 and 114.

vAs so :far described the system is that of my ,prior patent, and is further described in my Patent No. 2,843,- 064 granted July 22, 1958. That patent explains the advantage of using four-way instead of three-way valves at 112 and 114, associated with check valves 118 and 120. The purpose of this is to prevent the operation of one main actuator from even temporarily reducing the pressure applied by the other actuator, it being understood that the stations are operated in alternation, one being unloaded, reloaded, and operated, while the cemented shoe in the other station is setting. However, in simpler form the valves 112 and 114- may be three-way valves, because the actuators 108 and are single acting, with gravity return. The auxiliary actuators 42 and 116 also are single acting, but preferably with spring return.

Now in accordance with the present invention, there is an additional connection 122 (FIG. 7), preferably through a reducing valve 62, to two solenoid operated three-way valves 124 and 126. These lead to the lower parts of the diaphragm housings '68 and 128. The upper parts 64 and 1311 are connected through flexible hoses to the water filled pads, as previously described. The pressure being applied to the pads may be indicated on a second pressure gauge 132, and may be adjusted by control handle 62, as previously described.

The electrical system for controlling the solenoid operated valves may be described with reference to FIG. 8, it being understood that this shows the circuitry for only one station. The diagram is duplicated for the other station, each being independently controlled. The pump motor circuit is not shown, for it runs continuously.

Referring to the electrical diagram, the solenoid valve 112 controls the main and auxiliary cylinders for one station, and the solenoid valve 124 controls the pad diaphragm of the same station. The clock timer is indicated at 43, and its clock motor at M, and its solenoid or clutch coil at 144. The clock here used has a maximum time of thirty seconds. It is made by E. W. Bliss Co. of Davenport, Iowa, and has the usual two pointers and a knob for adjusting one of them. Contacts 9, 10 and 6, 8 close instantaneously when the clutch coil 14.4 is energized, and open when the coil is de-energized. Contacts 4, 5 open when the movable pointer reaches zero. Contacts 11, 12 open slightly later. The delay is adjustable in the clock, and is here set for about one half second. Contacts 11, 12 and '4, 5 reclose when the .timer is reset.

To start the machine the operator depresses the foot treadle 46, which closes contacts 148, which energizes coil 144, the circuit then being from line L2 to coil 144 to conductor 150, contacts 145, conductor 152, and conductor -154back to line L1. Also, the timing motor M is started, the circuit being from line L2 to the clock motor M, conductor 156, conductor 158, conductor 150, contacts 148, conductor 152, and conductor 154 back to line L1.

Energization of coil 144 moves its contacts upward, whereupon solenoid 162 of valve 112 is energized by current from line L2, conductor 160, coil 162, conductor 164, contacts 8, 6, and conductor 154 back to line L1. .Meanwhile, valve 124 is energized by a circuit from line L2, conductor 166, coil 168, conductor 170, contacts 5, 4, contacts =8, 6, and conductor 154 back to line .L1.

The closing of contacts 9, 16,'keeps motor M in operation, that is, these act as holding contacts forthe motor until the motor runs out. They also are holding contacts for the coil 144 until the motor runs out. The circuit for the motor is from line L2, motor M, conductor 156, contacts 12, 11, contacts 10,9, conductor 172, emergency button 174, conductor 176, and conductor 154 back to line L1. The circuit for coil 144 is from line L2, coil 144, conductor 158, contacts 12, 11, contacts 10, 9, conductor 172, emergency button 174, conductor 176, and conductor 154 back to line L1.

In the meantime the treadle 46 has been released, opening contacts 148. When the clock time runs out the motor contacts 4, 5 lift and open immediately, thereby de-energizing valve solenoid 168 and relieving the pad pressure. The motor contacts 11, 12 also lift and open slightly later, and the motor stops and the coil 144 is de-energized. This opens the holding contacts 9, 10, so there is no longer a holding circuit, and opens the contacts 6, 8 so that valve solenoid 162 is de-energized and the main cylinder is released. The contacts 4, 5 open first, and the time difierence is adjustable, and is here kept very slight. V

This precaution is taken to prevent the pad from expanding excessively or ballooning out should the platen descend first. The timing relieves the pad pressure just before the cylinder pressure is relieved. No difference in timing is needed when starting up, because there is an inherent delay in the filling out of the pad with extra fluid.

The reducing valve 62 is adjustable to take care of great variation in shoe size and shape. The main cylinder may develop a total force on the shoe of 2,000 to 3,000 pounds. With a large shoe bottom area the pad may need less pressure, and with a small shoe bottom area it may need more pressure, to keep the pad from being distorted or bulged excessively around the perimeter of the shoe sole. Moreover, the total force applied by the main cylinder is often varied by the operator, depending upon the shoe material and the cement, and the pad pressure then too may be adjusted to compensate for this. This is done by handles 62 and 102 shown in FIG. 2.

Sometimes the shoe has no preattached heel, and instead the heel is attached later. In such case a slug is provided and is inserted between the two pads to fill the open heel space. The heel breast flap then lies approximately horizontally beneath the heel area of the shoe, without cement.

It is believed that the construction and operation of my improved shoe machine for sole and for heel breast flap laying, as well as the advantages thereof, will be apparent from the foregoing detailed description. When the actuators are bein operated the quantity of water in the pad is boosted to whatever extent is needed to more quickly adapted the pad shape to the shoe bottom. This is done automatically, without in any way complicating the handling of the machine by the operator.

It will be understood that while I have shown and described the shoe machine in a preferred form, changes may be made without departing from the scope of the invention, as sought to be described in the following claims.

I claim:

1. A shoe machine for sole laying, comprising an upright main hydraulic actuator, a motor driven oil pump for said actuator, a water filled pad having a flexible top for supporting a shoe bottom against the force of the actuator, a housing with a movable diaphragm therein, means connecting one side of said diaphragm housing to the oil pump, and means connecting the other side of the diaphragm housing to the water filled pad, the oil and water being separated by said diaphragm, the flexible top of said pad being made of a material selected for abrasion resistance and heat resistance, and the material of said diaphragm being selected for resistance to oil.

2. A shoe machine for sole laying, comprising an upright main hydraulic actuator, a motor driven oil pump for said actuator, a water filled pad having a flexible top for supporting a shoe bottom against the force of the actuator, a housing with a movable diaphragm therein, a pressure reducing valve, means connecting one side of said diaphragm housing to the oil pump through the pressure reducing valve, and means connecting the other side of the diaphragm housing to the water filled pad, the oil and water being separated by said diaphragm, the flexible top of said pad being made of a material selected for abrasion resistance and heat resistance, and the material of said diaphragm being selected for resistance to oil, and the arrangement being such that when the main actuator is being operated the quantity of water in the pad is boosted to the extent needed to more quickly adapt the pad shape to the shoe bottom.

3. A shoe machine for sole and heel breast flap laying, comprising an upright main hydraulic actuator, a horizontal auxiliary hydraulic actuator, a motor driven pump for said actuators, a heel pad moved horizontally by said auxiliary actuator, a liquid filled toe pad for supporting a shoe bottom against the force of the main actuator and for supporting the heel breast against he force of the auxiliary actuator, a pressure reducing valve, and means for transmitting a pressure developed by the pump through the pressure reducing valve to the liquid filled pad, the arrangement being such that when the main and auxiliary actuators are being operated the quantity of liquid in the toe pad is boosted to the extent necessary to more quickly adapt the pad shape to the shape of the shoe.

4. A shoe machine for sole and heel breast flap laying, comprising an upright main hydraulic actuator, a horizontal auxiliary hydraulic actuator, 21 motor driven oil pump for said actuators, a heel pad moved horizontally by said auxiliary actuator, a water filled toe pad for supporting a shoe bottom against the force of the main actuator and for supporting the heel breast against the force of the auxiliary actuator, a housing with a movable dia phragm, means connecting one side of said diaphragm housing to the oil pump, and means connecting the other side of the diaphragm housing to the water filled pad, the oil and water being separated by said diaphragm.

5. A shoe machine for sole and heel breast flap laying, comprising an upright main hydraulic actuator, a horizon: tal auxiliary hydraulic actuator, a motor driven oil pump for said actuators, a heel pad moved horizontally by said auxiliary actuator, a water filled toe pad for supporting a shoe bottom against the force of the main actuator and for supporting the heel breast against the force of the auxiliary actuator, a housing with a movable diaphragm, a pressure reducing valve, means connecting one side of said diaphragm housing to the oil pump through the pressure reducing valve, and means connecting the other side of the diaphragm housing to the water filled pad, the oil and water being separated by said diaphragm, and the arrangement being such that when the main and auxiliary actuators are being operated the quantity of water in the toe pad is boosted to the extent necessary to more quickly adapt the pad shape to the shape of the shoe.

6. A shoe machine for sole laying, comprising an upright main hydraulic actuator, a main solenoid operated valve, a motor driven pump for supplying said actuator through said main valve, a liquid filled pad for supporting a shoe bottom against the force of the actuator, an auxiliary solenoid operated valve, means for transmitting a pressure developed by the pump through the auxiliary valve to the liquid filled pad, a clock timer, a treadle, and circuitry controlled by momentary operation of said treadle to start said clock timer and to energize said valves to operate the actuator and the pad, and means whereby running out of said timer de-energizes said valves to relieve said actuator and pad, the aforesaid clock timer and circuitry controlled thereby being so arranged that the auxiliary valve isde-energ'med to relieve the liquid filled pad just before the main valve is deenergized to release the main actuator.

7. A shoe machine for sole laying, comprising an up right main hydraulic actuator, a main solenoid operated valve, a motor driven pump for supplying said actuator through said main valve, a liquid filled pad for supporting a shoe bottom against the force of the actuator, a pressure reducing valve, an auxiliary solenoid operated valve, means for transmitting a pressure developed by the pump through the auxiliary valve and the pressure reducing valve to the liquid filled pad, a clock timer, a treadle, and circuitry controlled by momentary operation of said treadle to start said clock timer and to energize said valves to operate the actuator and the pad and means whereby running out of said timer de-energizes said valves to relieve said actuator and pad, the aforesaid clock timer and circuitry controlled thereby being so arranged that the auxiliary valve is die-energized to relieve the liquid filled pad just before the main valve is de-energized to release the main actuator, the arrangement being such that when the main actuator is being operated the quantity of liquid in the pad is boosted to the extent needed to more quickly adapt the pad shape to the shoe bottom.

8. A shoe machine for sole laying, comprising an upright main hydraulic actuator, 21 main solenoid operated valve, a motor driven oil pump for supplying said actuator through said main valve, 21 water filled pad for supporting a shoe bottom against the force of the actuator, a housing with a movable diaphragm, an auxiliary solenoid operated valve, means connecting one side of the diaphragm housing to the oil pump through the auxiliary valve, means connecting the other side of the diaphragm housing to the water filled pad, the oil and water being separated by said diaphragm, a clock timer, a treadle, and circuitry controlled by momentary operation of said treadle to start said clock timer and to energize said valves to operate the actuator and the diaphragm, and means whereby running out of said timer de-energizes said valves to relieve said actuator and diaphragm.

9. .A shoe machine for sole laying, comprising an upright main hydraulic actuator, a main solenoid operated valve, a motor driven oil pump for supplying said actuator through said main valve, a water filled pad for supporting a shoe bottom against the force of the actuator, a housing with a movable diaphragm, a pressure reducing valve, an auxiliary solenoid operated valve, means connecting one side of the diaphragm housing to the oil pump through the auxiliary valve and the pressure reducing valve, means connecting the other side of the diaphragm housing to the Water filled pad, the oil and water being separated by said diaphragm, a clock timer, a treadle, and circuitry controlled by momentary operation of said treadle to start said clock timer and to ener gize said valves to operate the actuator and the diaphragm, and means whereby running out of said timer de-energizes said valves to relieve said actuator and diaphragm, the arrangement being such that when the main actuator is being operated the quantity of Water in the pad is boosted to the extent needed to more quickly adapt the pad shape to the shoe bottom.

It A shoe machine for sole laying, comprising an upright main hydraulic actuator, a main solenoid operated valve, a motor driven oil pump for supplying said actuator through said main valve,'a water filled pad for supporting a shoe bottom against the force of the actuator, a housing with a movable diaphragm, an auxiliary solenoid operated valve, means connecting one side of the diaphragm housing to the oil pump through the auxiliary valve, means connecting the other side of the diaphragm housing to the Water filled pad, the oil and water being separated by said diaphragm, a clock timer, a treadle, and circuitry controlled by momentary operation of said treadle to start said clock timer and to energize said valves to operate the actuator and the diaphragm, and means whereby running out of said timer de-energizes said valves to relieve said actuator and diaphragm, the aforesaid clock timer and circuitry controlled thereby being so arranged that the auxiliary valve is tie-energized to relieve the water filled pad just before the main valve is de-energized to release the main actuator.

11. A shoe machine for sole laying, comprising an upright main hydraulic actuator, a main solenoid operated valve, a motor driven oil pump for supplying said actuator through said main valve, a water filled pad for supporting a shoe bottom against the force of the actuator, a housing with a movable diaphragm, a pressure reducing valve, an auxiliary solenoid operated valve, means connecting one side of the diaphragm housing to the oil pump through the auxiliary valve and the pressure reducing valve, means connecting the other side of the diaphragm housing to the water filled pad, the oil and water being separated by said diaphragm, a clock timer, a treadle, and circuitry controlled by momentary operation of said treadle to start said clock timer and to energize said valves to operate the actuator and the diaphragm, and means whereby running out of said timer de-energizes said valves to relieve said actuator and diaphragm, the arrangement being such that when the main actuator is being operated the quantity of water in the pad is boosted to the extent needed to more quickly adapt the pad shape to the shoe bottom, the aforesaid clock timer and circuitry controlled thereby being so arranged that the auxiliary valve is de-energized to relieve the Water filled pad just before the main valve is deenergized to release the main actuator.

12. A shoe machine as defined in claim 9, in which there is an auxiliary hydraulic actuator connected to the main actuator and controlled by the main valve, and in which there is a heel pad movable toward and away from the water filled pad by the auxiliary actuator so that the machine may be used for heel breast flap laying of ladies high-heeled shoes.

13. A shoe machine as defined in claim 11, in which there is an auxiliary hydraulic actuator connected to the main actuator and controlled by the main valve, and in which there is a heel pad movable toward and away from the water filled pad by the auxiliary actuator so that the machine may be used for heel breast fiap laying of ladies high-heeled shoes.

14. A shoe machine for sole laying, comprising an upright main hydraulic actuator, a main solenoid operated valve, a motor driven pump for supplying said actuator through said main valve, a liquid filled pad for supporting a shoe bottom against the force of the actuator, an auxiliary solenoid operated valve, means for transmitting a pressure developed by the pump through the auxiliary valve to the liquid filled pad, a clock timer, a treadle, circuitry controlled by momentary operation of said treadle to start said clock timer and to energize said valves to operate the actuator and the pad, means whereby running out of said timer de-energizes said valves to relieve said actuator and pad, an auxiliary hydraulic actuator connected to the main actuator and controlled by the main valve, and a heel pad movable toward and away from the water filled pad by the auxiliary actuator so that the machine may be used for heel breast flap laying.

References Cited by the Examiner UNITED STATES PATENTS 2,444,331 6/1948 Brauner 12-33 2,843,864 7/1958 Haas 12-36 2,866,987 1/1959 Smith et al. 1236 3,092,860 6/1963 Haas 1216.4 X

' FOREIGN PATENTS 883,720 7/1953 Germany. 1,097,316 1/1961 Germany.

457,748 12/1936 Great Britain.

857,851 1/1961 Great Britain.

FRANK J. COHEN, Primary Examiner. JORDAN FRANKLIN, Examiner.

P. D. LAWSON, Assistant Examiner. 

1. A SHOE MACHINE FOR SOLE LAYING, COMPRISING AN UPRIGHT MAIN HYDRAULIC ACTUATOR, A MOTOR DRIVEN OIL PUMP FOR SAID ACTUATOR, A WATER FILLED PAD HAVING A FLEXIBLE TOP FOR SUPPORTING A SHOE BOTTOM AGAINST THE FORCE OF THE ACTUATOR, A HOUSING WITH A MOVABLE DIAPHRAGM THEREIN, MEANS CONNECTING ONE SIDE OF SAID DIAPHRAGM HOUSING TO THE OIL PUMP, AND MEANS CONNECTING THE OTHER SIDE OF THE DIA- 